102345444 has 30 divisors (see below), whose sum is σ = 267552054. Its totient is φ = 34115040.

The previous prime is 102345443. The next prime is 102345493. The reversal of 102345444 is 444543201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 76212900 + 26132544 = 8730^2 + 5112^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (102345443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 157617 + ... + 158264.

Almost surely, 2^102345444 is an apocalyptic number.

It is an amenable number.

102345444 is an abundant number, since it is smaller than the sum of its proper divisors (165206610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102345444 is a wasteful number, since it uses less digits than its factorization.

102345444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315897 (or 315886 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 102345444 is about 10116.5925093383. The cubic root of 102345444 is about 467.7597386089.

Adding to 102345444 its reverse (444543201), we get a palindrome (546888645).

The spelling of 102345444 in words is "one hundred two million, three hundred forty-five thousand, four hundred forty-four".